18563

Appears in sequences

• Number of nonempty subsets of {1,2,...,n} in which exactly 1/2 of the elements are <= n/3.at n=17A047193
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/2 of the elements are <= (n+1)/3.at n=17A048038
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/2 of the elements are <= (n+2)/3.at n=17A048071
• Pisot sequence L(6,7).at n=23A048585
• Pisot sequence L(7,9).at n=22A048589
• Third column (m=4) of array A090452.at n=18A090453
• a(n) = binomial(n,6)-1.at n=12A124089
• a(n) is the n-th J_19-prime (Josephus_19 prime).at n=9A163799
• Number of achiral molecules containing two linear or branched chiral alkyl chains of n carbon atoms each.at n=12A261336
• Sum of the odd parts in the partitions of n into 6 parts.at n=35A309550
• Number of series-reduced rooted trees whose leaves are strict integer partitions whose multiset union is a strict integer partition of n.at n=21A320176